Engineering spin waves in a high-spin ultracold Fermi gas

Jannes Heinze; Jasper Simon Krauser; Nick Fläschner; Klaus Sengstock; Christoph Becker; Ulrich Ebling; Andre Eckardt; Maciej Lewenstein

doi:10.1103/physrevlett.110.250402

arXiv · 1302.4323

Engineering spin waves in a high-spin ultracold Fermi gas

Jannes Heinze·Jasper Simon Krauser·Nick Fläschner·Klaus Sengstock·Christoph Becker·Ulrich Ebling·Andre Eckardt·Maciej Lewenstein

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Abstract

We report on the detailed study of multi-component spin-waves in an s=3/2 Fermi gas where the high spin leads to novel tensorial degrees of freedom compared to s = 1/2 systems. The excitations of a spin-nematic state are investigated from the linear to the nonlinear regime, where the tensorial character is particularly pronounced. By tuning the initial state we engineer the tensorial spin-wave character, such that the magnitude and sign of the counterflow spin-currents are effectively controlled. A comparison of our data with numerical and analytical results shows excellent agreement.

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Jannes Heinze, Jasper Simon Krauser, Nick Fläschner, Klaus Sengstock, Christoph Becker, Ulrich Ebling, Andre Eckardt, Maciej Lewenstein. 2013-02-18. Engineering spin waves in a high-spin ultracold Fermi gas. https://doi.org/10.1103/physrevlett.110.250402

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